Potting up is fine to do any time of year. Ideal timing for repotting is the 2nd half of June. Not to say you'd kill them if you repot now, but you might consider just potting up now, and plan the full repot for next June when the plants would prefer it.

Potting up is okay so long as you're not going to add so much more water retentive soil that the plant can't dry it out quickly enough that its roots suffocate and die in saturated conditions. Remember that plants grow slower and need less water in wintertime, so you might consider just introducing good fertilizer and focusing on maintaining good soil moisture (which is moist, not wet).

As for repotting, question is really what you're trying to accomplish. It's not that healthy plants that are repotted now will die; they just won't respond as well as plants repotted in June. I'll try to explain why.

According to Al, who I've learned to trust by putting his advice into practice over the past year, most plants, especially house plants, will reach their maximum potential faster if you repot around June. That's because early summer is when they'll get the most sunlight from the longer days to manufacture ample energy to regrow roots, and when they are programmed to grow vegetation as soon as the roots are able to support it..

If the plant is 'circling the drain' and may not make it through the winter in good enough shape to survive repotting in six months, repot it now.

Some of us are a little impatient or have other reasons to repot at a sub-optional time of year. There's nothing wrong with that; it just means that they won't get the advantage of the plant's natural energy cycle, stressing the plant at a time when it's programmed to store energy, which means a longer recovery time while it uses stored energy to develop new roots before it can begin to grow again instead of storing more energy to deal with the winter. Supplemental light and good watering and fertilizing will help, but you can't simulate summer sunlight without spending some serious money on high-end lighting.

Other reasons to wait are having more time to find the right ingredients for a well aerated fast draining soil; giving marginal plants time to get stronger so they'll recover from repotting faster; and giving yourself time to learn more about got growing practices.

I hope something in there helps you decide!

Thank you for taking the time to respond to me. I was concerned about the plant having visible roots, and not having enough room. My Bird of Paradise is giving off a funky smell and I can see it’s roots in the drainage holes, so I need to pull it out and see if any of it’s roots are dead. I guess I was more concerned with some the plant’s roots being exposed, if that doesn’t sound too crazy?

If the roots are clogging the drain hole, It could be retaining too much water and could be causing some root rot. I'd pull it out and check/remove as little as possible to free up the drainage. If your soil has broken down, as referenced by Litterbuggy

"If the plant is 'circling the drain' and may not make it through the winter in good enough shape to survive repotting in six months, repot it now."

If you do repot, keep it out of direct sunlight (bright indirect) and do not fertilize for a month while it recovers.

chlozilla (I love your screen name!), the exposed roots are the kind that transport water picked up by those all-important fine feeder roots we all love so much, so don't fret about them.

mblan is right. Photos of the whole plant and its roots would be helpful, but that bad smell means bad things are going on that need to be fixed sooner rather than later, the soil has been staying wet for far too long, suffocating and killing roots, and the plant needs to be in a better environment than it is now. That means either replanting in the same kind of soil but with ballast or repotting in a fast draining well aerated mix like 5:1:1. And then there's watering, because the best way to avoid this and other kinds of trouble is to learn how to tell when your plants need water and how to water once they do.

Here's Al's thread about ballast. It worked very well for me with an overpotted plant that took forever to dry out, and it might be the easiest option if you can't whip up a batch of 5:1:1.

But back to your plant. Lay the plant down and gently pull the soil from the pot, squeezing the pot lightly if it helps. If the roots that are sticking out get in the way cut them off with a scissors or shears that have been sterilized with alcohol. Don't panic if the root ball falls apart; just don't let any healthy roots dry out while you're working, and tear as few healthy roots as you can.

Healthy thicker roots look like the ones sticking out of the pot, and feeder roots are white or tan and are very thin or even hairy looking. Rotted roots will smell bad and/or be dark brown or black. Use your sterilized shears to cut all the rotten stuff back to healthy tissue, then stick the plant in a clean pot with some of the soil tucked around the roots for now. If you don't have another pot, stick the plant and soil in a bowl, wash the pot with hot soapy water, immerse it in a bucket with bleach solution for half an hour, wash it again, rinse it very well, and then put the plant in it. It can stay that way for days if necessary.

Then, of course, post back with photos of the whole plant and details of what you found!